12615453666 has 24 divisors (see below), whose sum is σ = 27718464384. Its totient is φ = 4145923320.

The previous prime is 12615453661. The next prime is 12615453667. The reversal of 12615453666 is 66635451621.

It is not an unprimeable number, because it can be changed into a prime (12615453661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4934346 + ... + 4936901.

It is an arithmetic number, because the mean of its divisors is an integer number (1154936016).

Almost surely, 2^12615453666 is an apocalyptic number.

12615453666 is an abundant number, since it is smaller than the sum of its proper divisors (15103010718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12615453666 is a wasteful number, since it uses less digits than its factorization.

12615453666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9871326 (or 9871323 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The spelling of 12615453666 in words is "twelve billion, six hundred fifteen million, four hundred fifty-three thousand, six hundred sixty-six".